/**
* Comparator for sorting.
*
* @param fuelLogEntry
* @return -1 if this is before the provided entry, 0 if equal, and 1 if greater.
*/
public int compareTo(FuelLogEntry fuelLogEntry) {
if (this.year < fuelLogEntry.getYear()) return -1;
else if (this.year > fuelLogEntry.getYear()) return 1;
else {
if (this.month < fuelLogEntry.getMonth()) return -1;
else if (this.month > fuelLogEntry.getMonth()) return 1;
else {
if (this.day < fuelLogEntry.getDay()) return -1;
if (this.day > fuelLogEntry.getDay()) return 1;
else {
return 0;
}
}
}
}
@Override
public boolean equals(Object object) {
if (object == null || object.getClass() != getClass()) return false;
else {
// its a fuel log entry, check equality.
FuelLogEntry fuelLogEntry = (FuelLogEntry) object;
// check date is equal
if (!this.getDate().equals(fuelLogEntry.getDate())) return false;
// check station equal
else if (!this.station.equals(fuelLogEntry.getStation())) return false;
// check odometer equal
else if (!this.getOdometer().equals(fuelLogEntry.getOdometer())) return false;
// check grade equal
else if (!this.getGrade().equals(fuelLogEntry.getGrade())) return false;
// check amount equal
else if (!this.getAmount().equals(fuelLogEntry.getAmount())) return false;
// check unitCost equal
else if (!this.getUnitCost().equals(fuelLogEntry.getUnitCost())) return false;
// they are equal.
else {
return true;
}
}
}